more than people think.
Ask them how many regulars they think are actually playing their limits, they will overestimate.
Realize how few different regulars play on your limit. E.g. say you know about 200 regulars playing the 2/4 game 3% would mean only 6 of them are doing this thing seriously and taking home 20k / month+ including rakeback, donkaments, sponsoring, etc.
It also depends who you call pro.
Do you call the average Joe who's having poker as a side job to pay for studies (e.g. me) a pro player? He can be making the hourly required, but he's just not gonna have the opportunity to put in volume.
2nd thing:
before or after taxes? (for me that's a 100K+ difference on 250k).
On donkament pro's
also realise that there are thousands of people who are playing donkaments. I wouldn't be able to estimate the ratio cash : tournament players, but I think it's easily like 1 : 50
there is a higher absolute number of donkament players who earn 250k+, but the player pool is just soo much bigger.
Imagine 500 regulars playing 6 max NLHE, each doing 6-8 tables on average, that'd mean over 500 games, more like 750, have to run to give them a seat.
Last but not least, the phrasing of the question is half the outcome.